slopes. An exceptional speed of 20 to 60 mph was recorded following the collapse of a lava lake at Mount Nyiragongo. The scaling relationship for lavas is that the average speed of a flow scales as the square of its thickness divided by its viscosity. This implies that a rhyolite flow would have to be about a thousand times thicker than a basalt flow to flow at a similar speed.

Temperature

The temperature of most types of molten lava ranges from about 800 C to 1200 C depending on the

1.Previous
3.Next